Fatal error: Uncaught Error: mysqli_stmt::bind_param(): Argument #2 cannot be passed by reference in /home/.sites/51/site898/web/fussball/db-connection.php:530
Stack trace:
#0 /home/.sites/51/site898/web/fussball/players.php(22): DatabaseConnection->getCoaches(true)
#1 {main}
  thrown in /home/.sites/51/site898/web/fussball/db-connection.php on line 530